Chemistry
Explainer: What is an electrode?
An electrode’s name depends on the circumstances. Confused? It may help to consider which electrochemical reaction is natural — and which is not.
MS-PS1-5
Develop and use a model to describe how the total number of atoms does not change in a chemical reaction and thus mass is conserved.
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PlanetsPlanets with hydrogen skies could harbor life
Microbes can live in a hydrogen atmosphere. This points to new space worlds that host alien life.
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PhysicsClosing in on fusion energy
Scientists blasted a tiny capsule of hydrogen with laser beams, setting off a reaction that released more energy than in earlier experiments. Still, scientists remain a long way from creating a reaction that releases more energy than it needs to get started.